SPOT WELDING JUDGMENT SYSTEM AND JUDGMENT METHOD

PROBLEM TO BE SOLVED: To provide a spot welding judgment system and a judgment method therefor which enable the quality of welding to be efficiently and highly accurately judged, and also, the improvement of the quality to be attained. SOLUTION: The spot welding judgment system is provided with: a r...

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Hauptverfasser:	MITSUOKA SHIGEAKI, MAKIUCHI SATOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a spot welding judgment system and a judgment method therefor which enable the quality of welding to be efficiently and highly accurately judged, and also, the improvement of the quality to be attained. SOLUTION: The spot welding judgment system is provided with: a resistance value detection means 108 detecting the resistance value between electrodes 102 at spot welding; an initial resistance value judgment means 110 comparing the resistance value at the initial stage of energizing in the spot welding with a preset threshold and judging the initial resistance value; a resistance value decrease judgment means 111 comparing the difference in the decrease between the maximum resistance value during the energizing period and the final resistance value at the terminal stage of the energizing with a preset threshold and judging the resistance value decrease; and an average resistance value judgment means 112. COPYRIGHT: (C)2006,JPO&NCIPI